Possible Duplicate:
Error with table
I'm writing a table with 4 columns and 1 row. The first column starts with a bracket. It compiles without issues:
\documentclass{article}
\begin{document}
\begin{tabular}{l l l l}
[k]bbb & `def' & [h]bbb & `def' \\
\end{tabular}
\end{document}
If I add another row like that, on the other hand, I receive an error message.
\documentclass{article}
\begin{document}
\begin{tabular}{l l l l}
[k]bbb & `def' & [h]bbb & `def' \\
[k]ccc & `def' & [h]ccc & `def' \\
\end{tabular}
\end{document}
! Missing number, treated as zero.
I can avoid the issue by adding some curly braces to the first column, but I'm curious what's going on with LaTeX and brackets in tables here.